Wherefore, with a loud and clear voice, I proclaim to all and testify, that those who are notorious for this transgression, who utter words which come “of the evil one,” (for such is swearing,) shall not step over the threshold of the Church. Let this present month be the time allowed you for reforming in this matter. Talk not to me, “Necessity of business compels me to use oaths, else people do not believe me.” To begin with this, retrench those oaths which come merely of habit. I know many will laugh, but it is better to be laughed at now, than wept for hereafter. They will laugh, who are mad. For who, I ask, in his right mind would laugh at the keeping of the commandment? But suppose they do; why, it will not be at us, but at Christ, that such men will laugh. You shudder at the word! I knew you would. Now if this law were of my making, at me would be the laughing; but if Another be the Lawgiver, the jeering passes over to Him. Yes, and Christ was once spit upon, and smitten with the palm, smitten upon the face. Now also He bears with this, and it is no wonder (οὐδὲν ἀπεικὸς)! For this, hell is prepared; for this, the worm that dies not. Behold, again I say and testify; let him laugh that will, let him scoff that lists. Hereunto are we set, to be laughed at and mocked, to suffer all things. We are “the offscouring” or the world, as blessed Paul says. If any man refuse to conform to this order, that man I, by my word, as with a trumpet's blast, do prohibit to set foot over the Church's threshold, be he prince, be he even the crowned head. Either depose me from this station, or if I am to remain, expose me not to danger. I cannot bear to ascend this throne, without effecting some great reformation. For if this be impossible, it is better to stand below. Nothing more wretched than a ruler who does his people no good. Do exert yourselves, and attend to this, I entreat you; and let us strive, and of a surety more will come of it. Fast, entreat God (and we will do the same with you) that this pernicious habit may be eradicated. It is no great matter, to become teachers to the world; no small honor to have it said everywhere, that really in this city there is not a man that swears. If this come to pass, you will receive the reward not only of your own good works; indeed what I am to you, this you will become to the world. Assuredly others also will emulate you; assuredly you will be a candle set upon a candlestick.
And is this, you will say, the whole matter? No, this is not all, but this is a beginning of other virtues. He who swears not, will certainly attain unto piety in other respects, whether he will or not, by dint of self-respect and awe. But you will urge that most men do not keep to it, but fall away. Well, better one man that does the will of the Lord, than ten thousand transgressors. In fact, hereby is everything subverted, everything turned upside down, I mean, because after the fashion of the Theatre we desire numbers not a select number. For what indeed will a multitude be able to profit? Would you learn that it is the saints, not the numbers, which make the multitude? Lead out to war ten hundred thousand men, and one saint, and let us see who achieves the most? Joshua the son of Nun went out to war, and alone achieved all; the rest were of no use. Would you see, beloved, that the great multitude, when it does not the will of God, is no better than a thing of naught? I wish indeed, and desire, and with pleasure would be torn in pieces, to adorn the Church with a multitude, yea, but a select multitude; yet if this be impossible, that the few should be select, is my desire. Do you not see, that it is better to possess one precious stone, than ten thousand farthing pieces? Do you not see that it is better to have the eye sound, than to be loaded with flesh, and yet deprived of sight? Do you not see that it is better to have one healthy sheep, than ten thousand with the murrain; that fine children, though few, are better than many children diseased withal; that in the Kingdom there will be few, but in hell many? What have I to do with a multitude? What profit therein? None. Rather they are a plague to the rest. It is as if one who had the option of ten healthy persons or ten thousand sick folks, should take to himself the latter in addition to the ten. The many who do nothing well, will avail us only for punishment hereafter, and disgrace for the time being. For no one will urge it as a point in our favor that we are many; we shall be blamed for being unprofitable. In fact, this is what men always tell us, when we say, We are many; “aye, but bad,” they answer.
Behold again: I give warning, and proclaim with a loud voice, let no one think it a laughing matter: I will exclude and prohibit the disobedient; and as long as I sit on this throne, I will give up not one of its rights. If any one depose me from it, then I am no longer responsible; as long as I am responsible, I cannot disregard them; on account not of my own punishment, but of your salvation. For I do exceedingly long for your salvation. To advance it, I endure pain and vexation. But yield your obedience, that both here and hereafter you may receive a plentiful reward, and that we may in common reap eternal blessings; through the grace and mercy of the only-begotten Son of God; to Whom with the Father and the Holy Ghost be glory, power, and honor, now and ever, world without end. Amen.
Source: Homilies on Acts (New Advent)